On Friday 29 April 2005 13:08, Andrew Morton wrote: > "Pedro Venda (SYSADM)" <[email protected]> wrote: > > We've made some changes on our ftp server, and since that it's been > > crashing frequently (everyday) with a kernel panic. > > > > We've configured the 5 IDE 160GB drives into md raid5 arrays with LVM on > > top of that. All filesystems are reiserfs. The other change we made to > > the server was changing from a patched 2.6.10-ac12 kernel into a newer > > 2.6.11.7. > > > > Not being able to see the whole stacktrace on screen, we've started a > > netconsole to investigate. Started the server and loaded it pretty bad > > with rsyncs and such... until it crashed after just 20 minutes. > > > > The netconsole log was surprising - "kernel BUG at kernel/sched.c:2634!" > > Strange. It'd be interesting to try disabling CONFIG_4KSTACKS. Also, > please add this to get a bit more info. hi, I'll try that. Should I do it with or without preemption? regards, pedro venda. > > diff -puN kernel/sched.c~a kernel/sched.c > --- 25/kernel/sched.c~a 2005-04-29 05:05:24.792004408 -0700 > +++ 25-akpm/kernel/sched.c 2005-04-29 05:06:36.015176840 -0700 > @@ -2631,7 +2631,12 @@ void fastcall add_preempt_count(int val) > /* > * Underflow? > */ > - BUG_ON(((int)preempt_count() < 0)); > + if ((int)preempt_count() < 0) { > + printk("preempt_count=%d\n", preempt_count()); > + BUG(); > + } > + if ((int)preempt_count() > 1000) > + printk("preempt_count=%d\n", preempt_count()); > preempt_count() += val; > /* > * Spinlock count overflowing soon? > _ -- Pedro João Lopes Venda email: pjvenda < at > rnl.ist.utl.pt http://maxwell.rnl.ist.utl.pt Equipa de Administração de Sistemas Rede das Novas Licenciaturas (RNL) Instituto Superior Técnico http://www.rnl.ist.utl.pt http://mega.ist.utl.pt
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